Senior Principal Software Architect
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Before you apply
LocationRO - Bucharest - AFI Park Floreasca, Romania
Work modeon-site
Typefull-time
SeniorityLead
Experience15+ yrs
DepartmentEngineering
Company size5,001–10,000 people
First seenOct 17, 2026 · 2w ago
Verified live10h ago
At a glanceSummarised by Seekless from the posting.
Bachelor's or Master's Degree in Computer Science/Mathematics or a similar field
Expertise in various concepts in digital ad serving, like forecasting, pacing models, real time bidding
Experience with advertising related protocols like openRTB and related data models
Experience with Podcast technologies including delivering audio, and video assets via protocols like HLS
Strong understanding of engineering software processes, lifecycle methodology, configuration management, release management, and system verification and testing
Ability to work independently and oversee entire projects or significant parts, focusing on completing the tasks on time
Ability to collaborate with cross timezone teams, and negotiate design tradeoffs based on organizational goals and priorities
Ability to collaborate across functions and communicate progress of large initiatives to senior leadership teams
Proven ability to research and become proficient in new technologies
Experience identifying and debugging performance bottlenecks
Good understanding of RESTful API design principles, API security standards, and best practices in API versioning and management
Strong analytical and problem-solving skills, with meticulous attention to detail and a dedication to continuous improvement
Proficiency in constructing detailed software architecture diagrams
Interpersonal skills and ability to interact and work with staff at all levels
15+ years of software engineering experience in Java programming language (preferably latest version of JDK), including 7+ years of experience crafting microservices and scalable products, utilizing diverse cloud platforms, ideally AWS
REST API-based microservices using SpringBoot / Dropwizard and Hibernate
Developing microservices that are large scale, high availability with circuit breakers & fault tolerant design
Designing and maintaining Public APIs, with best practice version control, and backwards compatibility
IAB defined protocols like oRTB, VAST
Proficiency with media containers such as Mp3 and Mp4, alongside audio-video codecs including H264, AAC/AAC+, and MPEG
Deep technical knowledge of HLS streaming technologies and delivery protocols
Hands-on experience with media processing tools like FFmpeg and AWS Elemental for advanced transcoding
Relational Databases (preferably MariaDB or MySQL)
Caching implementations (like Redis, Memcached, etc)
Messaging platforms (preferably Kafka, AWS EventBus)
Security basics (e.g., OAuth2 standard)
Working with containers (Docker, Kubernetes)
AWS Cloud Services, e.g., S3, Lambda, API Gateway, ElasticCache, CloudTrail, Athena, Kinesis, SQS, EKS, Cognito, etc
Automated integration testing frameworks and tools, like Wiremock, Cucumber and Playwright
Observability tools like Prometheus, Grafana, ELK stack
Collaboration tools like Lucidchart, Jira and Confluence
NoSQL databases knowledge is a plus (e.g., Druid, DynamoDB, MongoDB)
Hands-on exposure to streaming server technologies such as Wowza, Icecast, or Shoutcast
Working knowledge of polyglot programming, specifically with languages like Python and Go
Skills
Java
SpringBoot
Dropwizard
Hibernate
REST
API
RESTful
OAuth2
HLS
oRTB
VAST
FFmpeg
AWS Elemental
MariaDB
MySQL
Redis
Memcached
Kafka
AWS EventBus
Docker
Kubernetes
AWS
S3
Lambda
API Gateway
ElasticCache
CloudTrail
Athena
Kinesis
SQS
EKS
Cognito
Wiremock
Cucumber
Playwright
Prometheus
Grafana
ELK stack
Lucidchart
Jira
Confluence
Python
Go
Wowza
Icecast
Shoutcast
Mp3
Mp4
H264
AAC
AAC+
MPEG
Benefits
Annual bonus
Training budget
Sports bonus
Meal tickets
Gift cards
Birthday off
Private medical
Private pension
Library subscription
Hardware
Parking
Company offsites
Csr activities
Getaways
Who We Are:
SiriusXM and its brands (Pandora, SiriusXM Media, AdsWizz, Simplecast, and SiriusXM Connect) are leading a new era of audio entertainment and services by delivering the most compelling subscription and ad-supported audio entertainment experience for listeners – in the car, at home, and anywhere on the go with connected devices. Our vision is to shape the future of audio, where everyone can be effortlessly connected to the voices, stories and music they love wherever they are.
This is where a diverse group of emerging talent and legends share authentic and purposeful songs, stories, sounds and insights through some of the best programming and technology in the world. Our critically acclaimed, industry-leading audio entertainment encompasses music, sports, comedy, news, talk, live events, and podcasting. Regardless of their role, each of our employees is vital in bringing SiriusXM’s vision to life daily.
SiriusXM Media is the gateway for marketers to North America’s most prominent digital audio advertising ecosystem. As the combined advertising revenue organization of SiriusXM Holdings Inc., SiriusXM Media spans across leading owned and operated audio platforms Pandora and SiriusXM; innovative ad tech solutions powered by AdsWizz; sonic creative consultancy Studio Resonate; and an extended content network featuring exclusive monetization agreements with Audiochuck, NBC Universal, SoundCloud, and many more. Reaching more than 150 million listeners each month, SiriusXM Media delivers audiences the tailored brand experiences they crave while putting creators first, making it easy for every marketer to produce, plan, buy and measure across its entire audio universe.
About AdsWizz
AdsWizz, a subsidiary of SiriusXM, is the leading global provider of digital audio and podcast advertising solutions. AdsWizz is the underlying monetization solution for well-known music platforms, podcasts, and broadcasting groups worldwide, giving advertisers of all sizes unprecedented access to premium and niche audio content. Through dynamic ad insertion, advanced programmatic platforms, and innovative audio formats, AdsWizz efficiently connects buyers and sellers for digital audio and podcast advertising. AdsWizz is a global company with a presence in over 40 countries and a Technology Development Hub in Bucharest, Romania.
How you’ll make an impact:
As a Senior Principal Software Engineer, you will join a highly performing-team of engineers who architect, and design podcast and ad-delivery services that are robust, scalable and secure. You will collaborate with cross-continent teams and execute initiatives while providing insights so AdsWizz technology infrastructure evolves with business objectives.
What you’ll do:
•
Design and build high-performance, stable, scalable AdsWizz systems that will be deployed in an enterprise setting.
•
Define and execute technology roadmap for Simplecast, Podcast monetization, Ad / Podcast delivery services.
•
Stay updated on the latest IAB standards for Podcast/Ad measurements, and modern protocols in the Ad Serving ecosystems, like oRTB, VASTadopt them onto AdsWizz services.
•
Establish and drive the evolution of AdsWizz audio and video transcoding features by integrating cutting-edge codecs and modern media formats.
•
Develop and maintain enterprise architecture frameworks that guide the technology investments across AdsWizz.
•
Lead high-level architecture discussions and planning sessions.
•
Collaborate with senior leadership to ensure that the AdsWizz’s technology roadmap are inline with its strategic objectives
•
Work with various teams of engineers building software in a collaborative development process.
•
Execute tasks with utmost clarity and precision, demonstrating a strong sense of ownership and providing clear direction to drive projects forward effectively.
•
Serve as a mentor, foster a collaborative environment and encourage and guide team members by being honest and direct.
•
Collaborate with the Product team to clarify the scope of the projects.
•
Collaborate with the Dev/Cloud Operations teams to ensure flawless production deployments and support the Incident Management team.
•
Contribute to the growth of various teams, by participating in interviewing and recruiting activities.
What you’ll need:
•
Bachelor’s or Master’s Degree in Computer Science/Mathematics or a similar field
•
Expertise in various concepts in digital ad serving, like forecasting, pacing models, real time bidding
•
Experience with advertising related protocols like openRTB and related data models.
•
Experience with Podcast technologies including delivering audio, and video assets via protocols like HLS
•
Strong understanding of engineering software processes, lifecycle methodology, configuration management, release management, and system verification and testing.
•
Ability to work independently and oversee entire projects or significant parts, focusing on completing the tasks on time.
•
Ability to collaborate with cross timezone teams, and negotiate design tradeoffs based on organizational goals and priorities.
•
Ability to collaborate across functions and communicate progress of large initiatives to senior leadership teams.
•
Proven ability to research and become proficient in new technologies
•
Experience identifying and debugging performance bottlenecks
•
Good understanding of RESTful API design principles, API security standards, and best practices in API versioning and management
•
Strong analytical and problem-solving skills, with meticulous attention to detail and a dedication to continuous improvement.
•
Proficiency in constructing detailed software architecture diagrams
•
Interpersonal skills and ability to interact and work with staff at all levels.
•
15+ years of software engineering experience in Java programming language (preferably latest version of JDK), including 7+ years of experience crafting microservices and scalable products, utilizing diverse cloud platforms, ideally AWS. Proficient in implementing industry best practices and design patterns tailored for microservices-driven applications.
•
Strong technical expertise in the following areas:
•
REST API-based microservices using SpringBoot / Dropwizard and Hibernate.
•
Developing microservices that are large scale, high availability with circuit breakers & fault tolerant design.
•
Designing and maintaining Public APIs, with best practice version control, and backwards compatibility
•
IAB defined protocols like oRTB, VAST.
•
Proficiency with media containers such as Mp3 and Mp4, alongside audio-video codecs including H264, AAC/AAC+, and MPEG.
•
Deep technical knowledge of HLS streaming technologies and delivery protocols.
•
Hands-on experience with media processing tools like FFmpeg and AWS Elemental for advanced transcoding.
•
Relational Databases (preferably MariaDB or MySQL), NoSQL databases knowledge is a plus (e.g., Druid, DynamoDB, MongoDB)
•
Caching implementations (like Redis, Memcached, etc)
•
Messaging platforms (preferably Kafka, AWS EventBus)
•
Security basics (e.g., OAuth2 standard)
•
Working with containers (Docker, Kubernetes)
•
AWS Cloud Services, e.g., S3, Lambda, API Gateway, ElasticCache, CloudTrail, Athena, Kinesis, SQS, EKS, Cognito, etc.
•
Automated integration testing frameworks and tools, like Wiremock, Cucumber and Playwright.
•
Observability tools like Prometheus, Grafana, ELK stack
•
Collaboration tools like Lucidchart, Jira and Confluence
Nice to have
Additional preferred qualifications and technical proficiencies include:
•
Hands-on exposure to streaming server technologies such as Wowza, Icecast, or Shoutcast.
•
Working knowledge of polyglot programming, specifically with languages like Python and Go.
Our offer – what’s in it for you:
•
Casual & friendly working environment with opportunities to impact the company with your ideas and involvement
•
Technology diversity, interesting technical exposure in building the best ad-tech product on the market
•
Corporate annual bonus system to celebrate personal and company wins
•
Individual training budget to use as you like for skill improvement
•
Sports bonus for activities such as gym, biking, and yoga
•
Meal tickets card for enjoyable lunch breaks
•
Gift cards for special events and holidays
•
Days off for your birthday and special events to recharge and enjoy your BIG moment
•
Private medical subscription to keep you healthy
•
Private Pension Fund (Pillar III) based on your years of tenure
•
Free library subscription for the book lover in you
•
Suitable hardware devices (new laptops / Macs, displays etc.)
•
Parking lots at office location – 60% co-funded by the company
•
Company offsites, CSR activities, and getaways to stay connected and keep the flame alive
Legal
Our goal at SiriusXM is to provide and maintain a work environment that fosters mutual respect, professionalism, and cooperation. SiriusXM is an equal opportunity employer that does not discriminate based on actual or perceived race, creed, color, religion, national origin, ancestry, alienage or citizenship status, age, disability or handicap, sex, gender identity, marital status, familial status, veteran status, sexual orientation or any other characteristic protected by applicable federal, state or local laws.
The requirements and duties described above may be modified or waived by the Company in its sole discretion without notice.
R-2026-07-125
Who We Are:
SiriusXM and its brands (Pandora, SiriusXM Media, AdsWizz, Simplecast, and SiriusXM Connect) are leading a new era of audio entertainment and services by delivering the most compelling subscription and ad-supported audio entertainment experience for listeners – in the car, at home, and anywhere on the go with connected devices. Our vision is to shape the future of audio, where everyone can be effortlessly connected to the voices, stories and music they love wherever they are.
This is where a diverse group of emerging talent and legends share authentic and purposeful songs, stories, sounds and insights through some of the best programming and technology in the world. Our critically acclaimed, industry-leading audio entertainment encompasses music, sports, comedy, news, talk, live events, and podcasting. Regardless of their role, each of our employees is vital in bringing SiriusXM’s vision to life daily.
SiriusXM Media is the gateway for marketers to North America’s most prominent digital audio advertising ecosystem. As the combined advertising revenue organization of SiriusXM Holdings Inc., SiriusXM Media spans across leading owned and operated audio platforms Pandora and SiriusXM; innovative ad tech solutions powered by AdsWizz; sonic creative consultancy Studio Resonate; and an extended content network featuring exclusive monetization agreements with Audiochuck, NBC Universal, SoundCloud, and many more. Reaching more than 150 million listeners each month, SiriusXM Media delivers audiences the tailored brand experiences they crave while putting creators first, making it easy for every marketer to produce, plan, buy and measure across its entire audio universe.
About AdsWizz
AdsWizz, a subsidiary of SiriusXM, is the leading global provider of digital audio and podcast advertising solutions. AdsWizz is the underlying monetization solution for well-known music platforms, podcasts, and broadcasting groups worldwide, giving advertisers of all sizes unprecedented access to premium and niche audio content. Through dynamic ad insertion, advanced programmatic platforms, and innovative audio formats, AdsWizz efficiently connects buyers and sellers for digital audio and podcast advertising. AdsWizz is a global company with a presence in over 40 countries and a Technology Development Hub in Bucharest, Romania.
How you’ll make an impact:
As a Senior Principal Software Engineer, you will join a highly performing-team of engineers who architect, and design podcast and ad-delivery services that are robust, scalable and secure. You will collaborate with cross-continent teams and execute initiatives while providing insights so AdsWizz technology infrastructure evolves with business objectives.
What you’ll do:
•
Design and build high-performance, stable, scalable AdsWizz systems that will be deployed in an enterprise setting.
•
Define and execute technology roadmap for Simplecast, Podcast monetization, Ad / Podcast delivery services.
•
Stay updated on the latest IAB standards for Podcast/Ad measurements, and modern protocols in the Ad Serving ecosystems, like oRTB, VASTadopt them onto AdsWizz services.
•
Establish and drive the evolution of AdsWizz audio and video transcoding features by integrating cutting-edge codecs and modern media formats.
•
Develop and maintain enterprise architecture frameworks that guide the technology investments across AdsWizz.
•
Lead high-level architecture discussions and planning sessions.
•
Collaborate with senior leadership to ensure that the AdsWizz’s technology roadmap are inline with its strategic objectives
•
Work with various teams of engineers building software in a collaborative development process.
•
Execute tasks with utmost clarity and precision, demonstrating a strong sense of ownership and providing clear direction to drive projects forward effectively.
•
Serve as a mentor, foster a collaborative environment and encourage and guide team members by being honest and direct.
•
Collaborate with the Product team to clarify the scope of the projects.
•
Collaborate with the Dev/Cloud Operations teams to ensure flawless production deployments and support the Incident Management team.
•
Contribute to the growth of various teams, by participating in interviewing and recruiting activities.
What you’ll need:
•
Bachelor’s or Master’s Degree in Computer Science/Mathematics or a similar field
•
Expertise in various concepts in digital ad serving, like forecasting, pacing models, real time bidding
•
Experience with advertising related protocols like openRTB and related data models.
•
Experience with Podcast technologies including delivering audio, and video assets via protocols like HLS
•
Strong understanding of engineering software processes, lifecycle methodology, configuration management, release management, and system verification and testing.
•
Ability to work independently and oversee entire projects or significant parts, focusing on completing the tasks on time.
•
Ability to collaborate with cross timezone teams, and negotiate design tradeoffs based on organizational goals and priorities.
•
Ability to collaborate across functions and communicate progress of large initiatives to senior leadership teams.
•
Proven ability to research and become proficient in new technologies
•
Experience identifying and debugging performance bottlenecks
•
Good understanding of RESTful API design principles, API security standards, and best practices in API versioning and management
•
Strong analytical and problem-solving skills, with meticulous attention to detail and a dedication to continuous improvement.
•
Proficiency in constructing detailed software architecture diagrams
•
Interpersonal skills and ability to interact and work with staff at all levels.
•
15+ years of software engineering experience in Java programming language (preferably latest version of JDK), including 7+ years of experience crafting microservices and scalable products, utilizing diverse cloud platforms, ideally AWS. Proficient in implementing industry best practices and design patterns tailored for microservices-driven applications.
•
Strong technical expertise in the following areas:
•
REST API-based microservices using SpringBoot / Dropwizard and Hibernate.
•
Developing microservices that are large scale, high availability with circuit breakers & fault tolerant design.
•
Designing and maintaining Public APIs, with best practice version control, and backwards compatibility
•
IAB defined protocols like oRTB, VAST.
•
Proficiency with media containers such as Mp3 and Mp4, alongside audio-video codecs including H264, AAC/AAC+, and MPEG.
•
Deep technical knowledge of HLS streaming technologies and delivery protocols.
•
Hands-on experience with media processing tools like FFmpeg and AWS Elemental for advanced transcoding.
•
Relational Databases (preferably MariaDB or MySQL), NoSQL databases knowledge is a plus (e.g., Druid, DynamoDB, MongoDB)
•
Caching implementations (like Redis, Memcached, etc)
•
Messaging platforms (preferably Kafka, AWS EventBus)
•
Security basics (e.g., OAuth2 standard)
•
Working with containers (Docker, Kubernetes)
•
AWS Cloud Services, e.g., S3, Lambda, API Gateway, ElasticCache, CloudTrail, Athena, Kinesis, SQS, EKS, Cognito, etc.
•
Automated integration testing frameworks and tools, like Wiremock, Cucumber and Playwright.
•
Observability tools like Prometheus, Grafana, ELK stack
•
Collaboration tools like Lucidchart, Jira and Confluence
Additional preferred qualifications and technical proficiencies include:
•
Hands-on exposure to streaming server technologies such as Wowza, Icecast, or Shoutcast.
•
Working knowledge of polyglot programming, specifically with languages like Python and Go.
Our offer – what’s in it for you:
•
Casual & friendly working environment with opportunities to impact the company with your ideas and involvement
•
Technology diversity, interesting technical exposure in building the best ad-tech product on the market
•
Corporate annual bonus system to celebrate personal and company wins
•
Individual training budget to use as you like for skill improvement
•
Sports bonus for activities such as gym, biking, and yoga
•
Meal tickets card for enjoyable lunch breaks
•
Gift cards for special events and holidays
•
Days off for your birthday and special events to recharge and enjoy your BIG moment
•
Private medical subscription to keep you healthy
•
Private Pension Fund (Pillar III) based on your years of tenure
•
Free library subscription for the book lover in you
•
Suitable hardware devices (new laptops / Macs, displays etc.)
•
Parking lots at office location – 60% co-funded by the company
•
Company offsites, CSR activities, and getaways to stay connected and keep the flame alive
Our goal at SiriusXM is to provide and maintain a work environment that fosters mutual respect, professionalism, and cooperation. SiriusXM is an equal opportunity employer that does not discriminate based on actual or perceived race, creed, color, religion, national origin, ancestry, alienage or citizenship status, age, disability or handicap, sex, gender identity, marital status, familial status, veteran status, sexual orientation or any other characteristic protected by applicable federal, state or local laws.
The requirements and duties described above may be modified or waived by the Company in its sole discretion without notice.